Week #4 - Engine Final Assembly - (study with week #3)

Question 1

True or False:Ambient temperature variation have a greater effect on brake power produced than altitude.

Answer 1

False

Question 2

True or False: A truck rebuilt diesel engine run-in procedure usually requires that the engine be operated at medium to low loads for the first 1,000 miles (1,600 km) of operation.

Answer 2

False

Question 3

Which of the following electronic controllers would have to be disabled before performing a chassis dynamometer test?

a. Automatic traction control (ATC)
b. Engine ECM
c. Transmission ECM
d. Collision warning system (CWS)

Answer 3

a. Automatic traction control (ATC)

Question 4

True or False:When performing dynamometer testing of an engine, the altitude of the test location must be considered when analyzing the power.

Answer 4

True

Question 5

True or False:It is usually essential to run a rebuilt diesel engine at full load for a short period after a rebuild to seat the piston rings.

Answer 5

True

Question 6

If all three options were available and time is not a consideration, which of the following options would be the preferred method of running-in a rebuilt engine?

a. Road test
b. Engine dynamometer
c. Chassis dynamometer

Answer 6

b. Engine dynamometer

Question 7

True or False:An engine dynamometer is likely to produce a brake power rating closer to the OEM-specified power than a chassis dynamometer test.

Answer 7

True

Question 8

True or False:The chassis dynamometer produces brake power readings at the wheels that are always lower than OEM-rated power.

Answer 8

True